<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片区域 -->
        <el-card>
            <!-- 消息提醒 -->
            <el-alert title="添加商品信息" type="info" show-icon center :closable="false">
            </el-alert>
            <!-- 步骤条 -->
            <el-steps :active="active - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- tab 栏区域 -->
            <el-form :model="addForm" :rules="rules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs tab-position="left" v-model="active" :before-leave="beforeTableLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input type="number" v-model="addForm.goods_price"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input type="number" v-model="addForm.goods_weight"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input type="number" v-model="addForm.goods_number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader :options="cateList" v-model="addForm.goods_cat" @change="cascaderHandleChange"
                                :props="cascaderProps">
                            </el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="C1" v-for="(C1, i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item></el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!-- action 图片上传服务器地址 -->
                        <el-upload :action="uploadURL" :headers="headerObj" :on-preview="handlePreview"
                            :on-remove="handleRemove" :on-success="handleSuccess" list-type="picture">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器组件 -->
                        <quill-editor v-model="addForm.goods_introduce"/>
                        <!-- 添加商品按钮 -->
                        <el-button type="primary" class="btnAdd" @click="addCate">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>

        <!-- 图片预览对话框 -->
        <el-dialog title="预览图片" :visible.sync="picVisibleSync" width="50%" @close="picClose">
            <img class="pic" :src="picFile" alt="预览图片">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    name: 'Add',
    data() {
        return {
            // 步骤条选中索引
            active: '0',
            // 添加表单数据
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_number: 0,
                goods_weight: 0,
                goods_cat: [],
                pics: [],
                // 商品详情描述
                goods_introduce:'',
                attrs:[]
            },
            // 商品分类数据
            cateList: [],
            // 参数列表数据
            PramasList: [],
            // 级联选择器配置
            cascaderProps: {
                value: 'cat_id',
                label: 'cat_name',
                children: 'children',
                expandTrigger: 'hover'
            },
            // 动态参数数据列表
            manyTableData: [],
            // 静态属性数据列表
            onlyTableData: [],
            // 上传图片的 url 地址
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的 headers 请求头
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            // 预览图片路径
            picFile: '',
            // 控制图片预览对话框显示与隐藏
            picVisibleSync: false,
            // 验证规则
            rules: {
                goods_name: [
                    { required: true, message: '请输入商品名称', trigger: 'blur' }
                ],
                goods_price: [
                    { required: true, message: '请输入商品价格', trigger: 'blur' }
                ],
                goods_number: [
                    { required: true, message: '请输入商品数量', trigger: 'blur' }
                ],
                goods_weight: [
                    { required: true, message: '请输入商品重量', trigger: 'blur' }
                ],
                goods_cat: [
                    { required: true, message: '请输入商品分类', trigger: 'blur' }
                ],
            }
        }
    },
    mounted() {
        this.getCateList()
    },
    computed: {
        cateId() {
            if (this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            } else {
                return null
            }
        }
    },
    methods: {
        // 获取商品分类数据
        async getCateList() {
            const { data: res } = await this.$http.get(`categories`)
            if (res.meta.status !== 200) return this.$message.error('获取商品分类数据失败！')
            this.cateList = res.data
            // console.log(res.data);
        },
        // 级联选择器选中触发事件
        cascaderHandleChange() {
            if (this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = []
            }
            // console.log(this.addForm.goods_cat);
        },
        // 标签页切换时触发事件
        beforeTableLeave(ctiveName, oldActiveName) {
            if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请先选择商品分类！')
                return false
            }
        },
        tabClicked() {
            // 证明访问的是动态参数面板
            if (this.active === '1') return this.getParamsData('many')
            // 证明访问的是静态属性面板
            if (this.active === '2') return this.getParamsData('only')
        },
        // 获取参数列表数据
        async getParamsData(activeName) {
            const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: activeName } })
            if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
            if (activeName === 'many') {
                res.data.forEach(item => {
                    item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
                })
                this.manyTableData = res.data
            } else {
                this.onlyTableData = res.data
            }
            // console.log(res.data);
        },
        // 预览图片处理函数
        handlePreview(file) {
            this.picFile = file.response.data.url
            this.picVisibleSync = true
        },
        // 处理移除图片的操作
        handleRemove(file) {
            this.addForm.pics = this.addForm.pics.filter(item => {
                return item.pic !== file.response.data.tmp_path
            })

        },
        // 监听图片上传成功事件
        handleSuccess(response) {
            const picInfo = {
                "pic": response.data.tmp_path
            }
            this.addForm.pics.push(picInfo)
            // console.log(this.addForm.pics);
        },
        // 关闭预览图片对话框事件
        picClose() {
            this.picVisibleSync = false
            this.picFile = ''
        },
        // 添加商品
        addCate(){
            this.$refs.addFormRef.validate(async valid => {
                if(!valid) return this.$message.error('请填写必要的表单项')
                //执行添加的业务逻辑
                // 处理动态参数
                this.manyTableData.forEach(item => {
                    const newInfo = {
                        'attr_id':item.attr_id,
                        'attr_value':item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo)
                })
                // 处理静态属性
                this.onlyTableData.forEach(item => {
                    const newInfo = {
                        'attr_id':item.attr_id,
                        'attr_value':item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo)
                })
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                // console.log(form);
                const {data:res} = await this.$http.post('goods',form)
                if(res.meta.status !== 201) return this.$message.error(res.meta.msg)
                this.$message.success('添加商品成功')
                this.$router.push('/home/goods')
                
            })
        }
    }
}
</script>

<style lang="less" scoped>
.el-checkbox {
    margin: 0 10px 0 0 !important;
}

.pic {
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>